Combination bore sighting device and bore scope



I Jan. 11, 1966 W. E- CHAPERON COMBINATION BORE SIGHTING DEVICE AND BORESCOPE Filed May 26, 1965 United States Patent 3,228,108 COMBINATION BORESIGHTING DEVICE AND BORE SCOPE William E. Chaperon, 500 th St., BayCity, Mich. Filed May 26, 1965, Ser. No. 459,062 4 Claims. (Cl. 33-46)This is a continuation-in-part application f my application on a BoreSighting Device, filed July 17, 1961, Serial No. 124,517, now abandoned,and relates to a combination bore sighting device and bore scope for usein sighting the bore and gun barrel, either during the course ofmanufacture or with guns presently in general use.

One of the prime objects of the invention is to provide a very simple,practical and effective combination bore sighting device and scope,operative on the principle of reflective light, which device can beeasily and quickly inserted into the gun chamber and/or bore of the gunafter the gun is secured in a vise or other securing means, so that thecondition of the barrel may be easily and conveniently inspected forwear, obstruction, and such other defects as may exist.

Another object of the invention is to provide a combination boresighting device and scope which, when used as a sighting device andinserted in position, prevents closing of the breech block andeliminates the necessity of the user attempting to bring his eye intohorizontal alignment with the gun bore to observe the condition of thebore.

A further object of the invention is to design a combination boresighting device and bore scope which can be readily manufactured andmounted, and by means of which sighting and accurate alignment can bedetermined Without use of live ammunition, said device being com pact insize so that it can be readily carried in the owners pocket for checkingthe gun in the field to determine if the barrel needs cleaning, and ifthere is dirt or other foreign matter in the bore making it dangerous tofire the gun.

A still further object is to provide a bore sighting device and borescope which is simple and easy to use, and which merely requires thatwhen used as a bore sighting device the breech be elevated so thatsufficient light enters the barrel and reflects the condition of theinterior surface thereof.

With the above and other objects in view, the present invention consistsin the combination and arrangement of parts, hereinafter more fullydescribed, illustrated in the accompanying drawing, and moreparticularly pointed out in the appended claims; it being understoodthat changes may be made in the form, size, proportion and minor detailsof construction, without departing from the spirit, or sacrificing anyof the advantages of the invention.

In the drawing:

FIG. 1 is a fragmentary side elevational view of a conventional riflewith my combination bore sight and scope mounted in position therein.

FIG. 2 is a full size side elevational view showing the mirror securedin position for fusing.

FIG. 3 is a view similar t FIG. 2, the broken away sections indicatingthe roughening of the outer surface of the device and the metalizingthereon.

FIG. 4 is a top plan view thereof.

FIG. 5 is an end elevational view of the device,

Referring now to the drawing in which I have shown one embodiment of myinvention.

The numeral indicates generally the breech of a conventional rifle towhich the instant device is applicable and in which the device is shownmounted in bore sighting position, the breech is shown merely for thepurpose of illustration, and includes a barrel 11 connected thereto3,228,108 Patented Jan. 11, 1966 in the conventional manner, whichbarrel is bored and rifled as at 12 as usual.

The device to which the instant application is directed is generallyL-shaped and comprises a one-piece member formed of transparentmaterial, a vertical base leg 14, substantially square in cross section,forms one end of the device the lower end of said leg terminating in anangularly disposed flat surface 15, and a laterally projectingcylindrical leg 16 is formed integral with the base leg 14 at a pointdirectly opposite the angled surface 15, said cylindrical leg beingoutwardly tapered as shown so that the end portion is of a size topermit it to be readily inserted in the end of the gun barrel 1 1 inexactly the same manner as is a bullet, the upper end of the base legserving as an optical window 17 and is highly polished to providemaximum visibility, and this also holds true for the optical window 18on the free end of leg 16.

A relatively thin, flat mirror section 19 formed of Lucite as is alsothe main body, is accurately mounted in intimate facial contact with theflat translucent surface 15 by means of translucent acrylic glue or thelike, the inner face of said mirror being absolutely flat while theouter surface is vacuum metalized and hacked to provide properreflecting surface.

A small metal strap 20 (see FIG. 2 of the drawings) secures the mirrorin position on the surface 15, after which the device is placed in anoven or other heated chamber (not shown), and subjected to a temperatureof approximately for approximately two hours time, and this fuses themirror in position on the surface 15.

After the device is cooled, the entire outer surface, with the exceptionof the optical surfaces 17 and 18, is sanded or otherwise roughened asindicated at B, after which the device is metalized as indicated at C,for the purpose of reducing or eliminating all glare and producing nearperfect light transmission where intended, the optical surfaces 17 and18 are, of course, protected during the metalizing process.

It will be noted that the edge 21 of the mirror 19 is slightly beveledto provide a smooth streamlined construction, and cross hairs 22 areprovided on the optical surface 18 on the end of the leg 16 to enablethe user to align the bore to target, thus permit sighting in withoutuse of ammunition.

The device has various uses and can be utilized as a safety devicebecause if the gun should accidentally remain loaded, the sight couldnot be placed in position in the barrel. It can also be used as a borescope to check the condition of the barrel, the sight is placed in thebarrel breech as indicated in FIG. 1 of the drawing, and the riflemounted in a securing device (not shown), thus the user will have bothhands free.

In checking the barrel, the user first sights through the opticalsurface 17, and then uses the naked eye to sight through the muzzle endof the barrel, thus inspecting the entire length of said barrel.

From the foregoing description, it will be obvious that I have perfecteda very simple, practical and inexpensive bore sighting device and scope,and method of producing same, it being understood that the disclosure asgiven is by way of illustrative example only, rather than by way oflimitation of the invention, and that the details may be varied withinthe scope of the appended claims.

What I claim is:

1. A combination bore sight and scope comprising; a generally L-shaped,one-piece member formed of a transparent material, including a verticalbase leg, substantially square in cross section, the lower end of saidleg terminating in an angularly disposed flat surface; a laterallyprojecting leg, generally cylindrical in cross section on the face ofthe vertical leg opposite the angularly disposed surface, thelongitudinal center line of which intersects the longitudinal centerline of said vertical leg, and a relatively thin mirror section providedon said angled flat surface.

2. The combination defined in claim 1 in which fiat optical, highlypolished surfaces are provided on the free ends of said vertical andhorizontal legs respectively, and a metalized coating covering theentire surface of said member, excepting said optical surfaces.

3. A combination bore sight and scope comprising; a generally L-shapedone-piece member formed of transparent material including a base leg,square in cross section, the lower end of the leg terminating in anangularly disposed fiat surface; a laterally projecting leg on the oneface of the base leg opposite said angularly disposed surface; the freeends of the square and cylindrical legs respectively forming opticalsights and a metalized coating covering the entire exterior surface of20 said member with the exception of the optical sights at the free endsof the square and cylindrical legs respectively.

4. In a device of the class described comprising; a

generally L-shaped, one-piece member formed of transparent materialincluding a base leg, square in cross section, the lower end of whichterminates in an angularly disposed fiat surface; a laterallyprojecting, cylindrical leg on one face of the base leg opposite saidangularly disposed surface; optical sighting surfaces at the free endsof the square and cylindrical members and a metalized coating forming acovering for the entire exterior surface of the device excepting theoptical sighting surfaces at the free ends of the square and cylindricalsurfaces respectively.

References Cited by the Examiner UNITED STATES PATENTS 2,403,452 7/1946Novak 88-44 2,696,052 12/1954 Czarnikow 3346 2,773,309 12/1956 Elliott3346 2,794,363 6/1957 Parfitt 88-14 2,961,362 11/1960 Landes 156--1542,992,153 7/1961 Lutwack l56154 ROBERT B. HULL, Primary Examiner.

SAMUEL S. MATTHEWS, Examiner.

1. A COMBINATION BORE SIGHT AND SCOPE COMPRISING; A GENERALLY L-SHAPED,ONE PIECE MEMBER FORMED OF A TRANSPARENT MATERIAL, INCLUDING A VERTICALBASE LEG, SUBSTANTIALLY SQUARE IN CROSS SECTION, THE LOWER END OF SAIDLEG TERMINATING IN AN ANGULARLY DISPOSED FLAT SURFACE; A LATERALLYPROJECTING LEG, GENERALLY CYLINDRICAL IN CROSS SECTION ON THE FACE OFTHE VERTICAL LEG OPPOSITE THE ANGULARLY DISPOSED SURFACE, THELONGITUDINAL CENTER LINE OF WHICH INTERSECTS THE LONGITUDINAL CENTERLINE OF SAID VERTICAL LEG, AND A RELATIVELY THIN MIRROR SECTION PROVIDEDON SAID ANGLED FLAT SURFACE.